Vacuum fresh packaging bag

ABSTRACT

A vacuum fresh packaging bag is provided, which is formed by fixedly splicing edges of an upper film and a lower film and has at least one end opening formed into the bag opening. The inner surfaces of the upper film and lower film both are densely provided with many convex strips which do not intersect with each other; the convex strips form many airflow channels there-between; the convex strips on the inner surfaces of the upper film and lower film are severed once by grooves which intersect with the convex strips along the strip direction. The utility model can compress, package and store foods and valuable ornaments in vacuum.

BACKGROUND OF THE INVENTION

The present invention relates to the field of compression, storage and preservation of household foods, seafood, and valuable ornaments, in particular to a vacuum fresh packaging bag.

Modern people pursue higher and higher living quality and dietetic hygiene. For common households, vacuum food bags are widely available now. Practices prove that the vacuum bags can isolate food from the air to guard the food against bacterial decomposition and oxidation in the air and therefore greatly prolong the time for storing the objects and improve the storage quality of objects. The most key technology of the vacuum bags available on the international market is that the inner surface of the bag is provided with airflow toughs or convex strips for guiding and exhausting the air to form a vacuum in the bag. Those vacuum bags are very useful when used to pack and store dry and irregularly shaped objects. However, the majority of the household users use the vacuum bags to pack and store foods, and most of the stored objects contain fluid. When used to package such subjects, the vacuum bags available in the market are very disappointing. The air between the wet food and the plastic bag surface cannot be completely pumped out because of deformation of the object and the isolation of the fluid to form an ideal vacuum, and thus, the storage and fresh-keeping of the food is affected.

A vacuum packaging bag is provided, wherein the two inner sides of the bag body both are provided with strip-like, mutually vertical projections and the air can flow out along the gaps formed by the convex strips. However, the convex strips of such bag structure are continuous and not severed, such that the grooves formed by the convex strips on one side cannot be connected; when the inner object partitions the two bag sides, the air in part of the grooves cannot be pumped out due to different object shapes and softness and therefore affects the object storage effect.

Chinese patent No. ZL200720051152.X, disclosed a vacuum packaging bag on Feb. 27, 2008, wherein the inner surface of any bag side is densely pressed to form a great amount of micro convex strips leading to the bag opening; air guide planes are arranged between the air guide channels in the lengthwise direction; and the front and rear adjacent air guide planes are interlaced. However, only one side of the bag body of this vacuum packaging bag has the convex strip structure; when the food is packaged by the bag, the plane structure on the other side of the bag body enables the bag body to stick to the object and blocks outflow of the air.

BRIEF SUMMARY OF THE INVENTION

To overcome the defects in the prior art, the utility model provides a vacuum fresh packaging bag, which pumps the air quickly, has a clear and beautiful pattern structure, generates vacuum all around, and achieves a long-lasting and reliable vacuum storage effect.

To solve the above technical problem, the utility model adopts the following solution:

A vacuum fresh packaging bag is formed by fixedly placing edges of an upper film and a lower film and has at least one end opening formed into the bag opening. The inner surfaces of both the upper film and the lower film are densely provided with many convex strips which do not intersect; said convex strips form many airflow channels there-between; the convex strips on the inner surfaces of said upper film and said lower film are at least severed once by grooves which intersect with said convex strips.

Furthermore, the convex strips on the inner surface of said upper film and the convex strips on the inner surface of said lower film are curved or straight lines which intersect at a certain angle.

Furthermore, said convex strips are wave-shaped strips extending along the edge direction of the bag opening.

Furthermore, the grooves intersecting with said convex strips form different patterns or words.

Furthermore, the outer surfaces of said upper film and said lower film are smooth surfaces.

Compared with the prior art, the utility model has the following beneficial effects:

The convex strips of the utility model form dense airflow channels; after the upper film and the lower film are spliced, those dense airflow channels intersect to form interconnected airflow channels; when the vacuumizer pumps air, air in the whole bag is easily pumped out through the airflow channels; the utility model is applicable to the fields such as households, restaurants, hotels and outdoor tourisms, and can compress, package and store foods and valuable ornaments in vacuum by using a vaccumizer.

BRIEF DESCRIPTION OF THE DRAWINGS

The attached drawings provide further description of the utility model, explain the utility model together with the embodiments of the utility model, and do not limit the utility model. Among the attached drawings:

FIG. 1 is a schematic view of a whole structure of a plastic bag of the utility model.

FIG. 2 is a schematic view of array structures of different patterns of the utility model.

FIG. 3 is a partial enlarged view of the airflow channels of the utility model.

In the figures: upper film 1, lower film 2,

bag opening 3, convex strip 4,

airflow channel 5, groove 6.

DETAILED DESCRIPTION OF THE INVENTION

The preferable embodiment of the utility model is described with reference to the attached drawings. It should be understood that the preferable embodiment provided here is only used for describing and explaining the utility model and shall not limit the utility model.

As shown in FIGS. 1-3, the utility model discloses a vacuum fresh packaging bag, which is formed by fixedly placing edges of an upper film 1 and a lower film 2 and has at least one end opening formed into the bag opening 3. The outer surfaces of the bag body are smooth surfaces; the inner surfaces are densely provided with many convex strips 4 which do not intersect; the convex strips 4 form many airflow channels 5 there-between; the dense airflow channels 5 on the films are arrayed to be interlaced at a certain angle; and when two films are spliced, the airflow channels 5 forming a certain angle intersect to form interconnected airflow channels. The upper film 1 and the lower film 2 both are provided with the airflow channels 5 to ensure that the air flows out more quickly; the interconnection among the airflow channels 5 can ensure that the air in the bag flows out more smoothly and completely.

As shown in FIG. 3, the convex strips 4 on the inner surface of the plastic bag are at least severed once by the grooves 6 with the strips. The grooves 6 intersecting with the strips make the airflow channels 5 along with the strip direction interconnected; when the inner surface of any one film sticks to the surface of the stored object, the grooves 6 intersecting with the convex strips can guide the air to flow out through other airflow channels 5. Thus, the partial airflow obstacle formed when the film sticks to the surface of the object is avoided; no dead corner is formed in the bag; and the vacuum degree is higher.

The grooves 6 which intersect with the films and convex strips 4 of the plastic bag can form different patterns or words which can be used as log or trademark of the product to meet the demands of difficult clients.

At last, it should be noted that: the above is only a preferable embodiment of the utility model, and is not used for limiting the utility model. Although the utility model is described in detail with the reference to the embodiment, those skilled in this field can also revise the technical solutions of various embodiments, or perform equivalent substitution for part of the technical features; however, within the spirit and principle of the utility model, any revision, equivalent substitution and improvement all shall be included in the protective scope of the utility model. 

What is claimed is:
 1. A vacuum fresh packaging bag, formed by fixedly placing edges of an upper film and a lower film, and having at least one end opening formed into the bag opening, characterized in that, the inner surfaces of both the upper film and the lower film are densely provided with many convex strips which do no intersect with each together; said convex strips form many airflow channels there-between; the convex strips on the inner surfaces of said upper film and said lower film are at least severed once by grooves which intersect with said convex strips.
 2. The vacuum fresh packaging bag according to claim 1, characterized in that the convex strips on the inner surface of said upper film and the convex strips on the inner surface of said lower film are curved or straight lines which intersect at a certain angle.
 3. The vacuum fresh packaging bag according to claim 1, characterized in that, said convex strips are wave-shaped strips extending along the edge direction of the bag opening.
 4. The vacuum fresh packaging bag according to claim 1, characterized in that, the grooves intersecting with said convex strips form different patterns or words.
 5. The vacuum fresh packaging bag according to claim 1, characterized in that the outer surfaces of said upper film and said lower film are smooth surfaces. 